I agree with kb525 that the Ferrari F60 body looks better and more realistic as the Red Bull than the McLaren body. When you do the current Lotus T128 you should again use the F60 body as it looks more like the Lotus than the McLaren would.
Basically the F60 body will stand in for most of the current F1 cars better than the McLaren; the McLaren has a slightly more "unique" look, especially with that ugly "humpback" air box behind the cockpit. It's a shame because I really like the chrome and red color scheme on the McLaren. Maybe Tamiya will do the MP4-25 from 2010 next; although I would prefer they do the actual Red Bull RB6 or RB7 instead.